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Conducting a polygraph examination

Lie detectors work with sensors, measuring the reactions of the body of a respondent and evaluating using a computer. When one is connected to the polygraph, they should answer truthfully to the questions that are asked. Here, the heart beat, galvanization, electrical conductivity of the skin and temperature is measured.

Lying causes stress, causing the skin to begin to sweat. This increases the electrical conductivity what is measured by two electrical contacts of the polygraph. These contacts are attached to the skin, placed under a weak tension. Increased sweating of the skin lets the amperage between the contacts raise up and is a clear indication of a lie! But in addition to the sweating of the skin, the human body reacts also with increased heart rate and increased respiration and temperature to stressful situations. These reactions / symptoms are also registered by the sensors and cover up false answers.

The 6x Polygraph Expert complete set contains?

6 physiological sensors and the Polygrah Software in Expert Version.

1. Data Aquisition Box: All phyisiological sensors (measurement probes) are connected here.
2. BVP HR Sensor: (Heart Rate, Blood Volume Pressure) HR heart rate and IBI (Inter Beat Interval, increasing the pace - measure pressure and stress)
3. GSR Sensor: Measuring the human galvanic Skin Response with 2 electrodes that connected to the human fingers for inspection of the sympathetic nervous system activity. The electric circuit is very sensitive and show values between 2000 to 60,000 very high resolution measurements.
4. Temperature Sensor: Measuring the peripheral skin temperature in 0.01 C resolution when the skin temperature become lower - this is another indicator for the sympathetic nerve system activation.
5. Abdominal breathing sensor: A stretched very sensitive sensor based on silicon rubber cord that measure the human abdominal breathing amplitude and breathing ration per minute .
6. Chest breathing sensor: stretched very sensitive sensor based on silicon rubber cord that measure the human chest breathing amplitude and breathing ration per minute.
7. The Air pressure input tube sensor (anti cheat sensor): A general "air pressure input" measurement sensor, very sensitive, high resolution and fast response that can measure any kind of input of "air pressure changes" such as: Blood pressure cuff, air pillow, hand base etc, for monitoring movements and other techniques that people are using to try to cheat the ploygraph.
8. USB cable: Connect the USB cable from the data box into your computer.